Intake manifold



p 2, 1930. c. P. BRocKwAY 1,774,632

INTAKE MANIFOLD Filed Oct. 22, 1920 3 Sheets-sheaf. 1

nzn [U1 INVENTOR. Carl 'P. brockvay BY I I I ATTORNEY p 2, 1930- c. P.BROCKWAY 1,774,632

INTAKE; MANIFOLD Filed 00 1,. 22, 1920 3 Sheets-Sheet 2 IN V EN TOR.Carl D. Bro ckwy A TTORNEY P 1930- 0. P. BROCKWAY 1,774,632

INTAKE MANIFOLD v Filed Oct. 22, 1920 5 Sheets-Sheet 3 IN VEN TOR. CarlR Drockwgf.

A TTORNEY Patented Sept. 2, 1930 UNITED STATES PATENT OFFICE CARL 1.BROCKWAY, OF TOLEDO, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THETILLOTSON MANUFACTURING COMPAN DELAWARE Y, OF TOLEDO, OHIO, ACORPORATION OF INTAKE MANIFOLD Application filed October 22, 1920.Serial No. 418,802.

This invention relatesto improvements in intake manifolds and has forits mainobject to supply each cylinder with a like quantity and qualityof motor fluid at all times.

Another object is to expose the mixture supplied from the eaburetor tolike surfaces in the intake manifold.

Another object is to provide structure and method to supply eachcylinder of the engine with such an equal distribution of fuel that nocylinder has any advantages over the others.

Still another object is to prevent one arm of the manifold frompocketing more gases and heavy particles of the mixture than any otherarm so that no cylinder is over-enriched with fuel.

The invention also has for one of its objects to prevent excessive fuelcharges in certain cylinders which causes heavy deposits of carbontherein. I

And it is a further object of my invention to arrange the inlets of theseveral conduits of the intake manifold around a distributing center inthe consecutive order in Which the respective cylinders are fired.

Another object of my'invention is to provide a manifold in which eachbranch to the separate cylinders provides a direct line of travel forthe mixture from the carburetor to the engine. I i i A further generalObJECt of my invention is to provide a manifold which is simple as wellas highly efficient and practical and which may be applied readily to aninternal combustion engine.

"With the above and other objects in view v my invention consists innovel features of I Figure III is a cross section through the manifoldon the center line of the branch conduits.

Figure IV is a fragmentary view, partly in section, showing thedistributing chamber.

ignates an internal combustion engine hav- I ing a carburetor 6 and anintake manifold in communication with each other by means of a conduit 8and an enlargement 9, from which radiate a number of arms 1O, 11, 12, 13leading respectively to the cylinders of the engine. The enlargement 9and arms may be integral or separately connected. The arms of themanifold, Figures I to IV, branch out horizontally from the enlargement9, turn at an angle towards the engine and dip below the horizontalplane of the enlargement and terminate in the respective ports of thecylinders.

-W'ithin the enlargement is a chamber 14 and extending into said chamberare cross webs 15 formed by the intersection of the several arms of themanifold meeting in the center of the chamber, thus dividing the uppersection of the chamber into ur like compartments which for conveniencehave been designated by the numerals 1', 2', 3, and 4 to correspond withthe respective cylinders 1, 2, 3, and 4 with which they are incommunication by the respective arms of the manifold. These compartmentsare circular in cross section and merge into the arms of the manifold.\Vith this construction any mixture will be exposed to like surfaces inall four compartments.

' It will be seen from Figure III that the numerals 1, 2, 3, and 4respectively represent the cylinders of the engine and thefiring orderof these cylinders will be. 1, 3, 4, and 2. The arrangement of theinlets of the several arm'sof the manifold around a central point in theweb 15 is such, that starting with the inlet or compartment 1' andcompleting a circle around that point the compartments 4 3, 4', and 2will follow consecutively in the order of the firing of the cylinders.arms 10 and 11 extend in opposite directions from the compartments 1 and3 in the outer half of the enlargement and are in alignment for aportion of their length, the arm 11 being shorter than arm 10 dips belowthe longer arm 12 which extends from compartment 1. Contiguous withcompartment at, is compartment 2 from which extends the arm 13. Thesearms 10, 11, 12, and 13 respectively form communication between thecompartments 1, 3, 1, and 2 and the cylinders which are supplied fromthese respective compartments in the order of the firing of thecylinders.

From this arrangement it will be observed that cylinderl is fed throughcompartment 1, while compartments 3 and 2 may receive a slight chargeand 1 will receive less than either 3 or 2. When cylinder 3 is fedthrough compartment 3, compartments 1 and 1 may receive slight charges,and 2 will receive less than either 1 or 1. This gives any heavyparticles collected in compartment 2 time to fall back into the chamber14. \Vhcn cylinder at is fed through compartment 1. 3 and 2 may receiveslight charges and 1 will receive less than 3 and 2. \Vhen cylinder 2 isfed through compartment 2, l, and 1 may receive slight charges and 3will receive less than 1 or 4'. The cycle is then completed withcompartment 1" ready to receive its charge.

In ordinary manifolds the arms 11 and 13 would meet each other on theside next to the engine and the arrangement of the arms of the manifoldwould be such that the firing order could not give a delivery throughcompartments 1, 2, i, 1 in a consecutive circular order. Thus whencylinder 1 draws in mixture, compartments 3 and 2 would pocket fuel,then when cylinder 3 is drawing in mixture it would be fed throughcompartment 1 in the ordinary arrangement, again causing a pocketing offuel in $3 and 2 thus over-enriching cylinder 1 which would be next totire. This will not occur with my de vice since I feed the arms of themanifold through the compartments 1, 2, 3, and 4 in a consecutivecircular order. There will be no alternate feeding between two arms sothat the other arms will pocket an undue amount of fuel. Moreover, thisgives a uniform cycle for all the compartments so that all thecompartments are in exactly the same condition with reference topocketed fuel, eddy currents, etc., when each of them delivers mixtureto a cylinder. Therefore each cylinder will receive a charge exactlylike the others in both quantity and quality.

In the modification illustrated in Figures V to. VII inclusive, I havelocated the enlargement 21 of the manifold below the horizontal plane ofthe intake ports of the engine The so that the arms 22, 23, 24:, and 25of the manifold will extend upwardly from the enlargen'ient 21.

The conduit 20 in the shape of'an inverted conical frustrum having itsnarrow lower end 26 in alignment with the mixing chamber of thecarburetor and its upper, larger end 27 in alignment with a chamber 28of the enlargement, establishes communication between the carburetor andthe arms of the manifold. IVithin the chamber 28 is placed a renrovablecone-shaped baflle 29 which, like the webs 15 in the modification ofFigure 1, causes the mixture from the carburetor to be exposed to likesurfaces in the chamber 28 for each cylinder and will produce a likeresult as obtained in the first described moditication.

Figure VIII is still another embodiment of my invention. From a web 30,depends a removable bafile 31 into a chamber 32 of the enlargement 33.In Figures V to VIII the arrangement of the arms 22, 23, 21, and 25 ofthe manifold around a central point in the enlargement is identical withthat described in relation to Figures 1 to 1V.

, Any form of distributing chamber and baffie arrangement may be used solong as the chamber and ballles are symmetrical with reference to theoutlets to the various branches leading to the cylinders and to theinlet leading from the carburetor. I have shown only one inlet leadingto the distributing chamber, however my invention contemplates anynumber of inlets to said chamber. hIoreover, any kind of motor fluid maybe used, as I do not wish to be limited to a fuel mixture formed in acarburetor.

The operation of the device will be obvious from the description. Whilethe engine is running, suction from the cylinders draws fuel from thecarburetor into the chamber of the enlargement where it is exposed tolike surfaces on the web or batlle for each of the cylinders.

While arm 10in Figures I to IV is being supplied with mixture, arms 11and 13 may be slightly charged since they are in a more direct line ofthe flow of the mixture. The amount pocketed in arm 12 would benegligible. Cylinder 3, next in order, is charged allowing possibly aslight charge to be collected in arms 12 and 10 and a negligible amountin arm 13. Cylinder 4: is next supplied leaving a small amount of fuelin arms 11 and 13 and a negligible amount in arm 10. When cylinder 2draws in fuel, arms 10 and 12 may pocket some fuel with anegligibleamount passing to arm 11. The same cycle is repeated when cylinder 1again draws in mixture. It will be seen from this arran ement andoperation that all cylinders are ed alike, and the mixture isdistributed to each arm of the manifold in a uniform manner in relationto all the remaining arms.

n," in) I am aware that the particular embodiment of my invention hereinshown and described, is susceptible of considerable variation Withoutdeparting from the spirit of the invention and therefore I desire toclaim the same broadly as well as specifically, as indicated by theappended claims.

What I claim is:

1. In a multicylinder internal combustion engine, the combination of acommon distributing chamber for fuel gases; a plurality of outlet portspositioned in the Wall of said chamber in symmetrical relation thereto;an inlet port positioned in the Wall of the chamber; a baflle plateoppositely positioned relative to the inlet port and partially coveringthe outlet ports; a plurality of conduits connecting the outlet {portsof the distributing chamber to the cylinders of the engine, the order ofconnection of the conduits with reference to the position of the portsand cylinders to said ports and said cylinders being difierent.

2. In a multicylinder internal combustion engine the combination of asubstantially cylindrical chamber, a plurality of outlet portspositioned sequentially and symmetrically around one end of the wall ofsaid cylinder; a single inlet port positioned centrally of the other endwall of the cylinder; a baflie plate positioned within the cylinderopposite to and displaced from said inlet port; a plurality of conduitsin number equal to the number of cylinders each of which connects acylinder with a port in the distributing chamher, the order ofconnection of said conduits to the ports in the chamber being differentthan the order of connection to the cylinders of the engine.

In testimony whereof, I aflix my signature.

CARL P. BROCKWAY.

